Revert of Encode reservation meta data in the snapshot blob.

test/cctest/test-serialize.cc

 // Copyright 2007-2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 96 matching lines @@
            decoder.Decode(make_code(UNCLASSIFIED, 2)));
   CHECK_EQ(ExternalReference::address_of_real_stack_limit(isolate).address(),
            decoder.Decode(make_code(UNCLASSIFIED, 3)));
   CHECK_EQ(ExternalReference::debug_break(isolate).address(),
            decoder.Decode(make_code(UNCLASSIFIED, 8)));
   CHECK_EQ(ExternalReference::new_space_start(isolate).address(),
            decoder.Decode(make_code(UNCLASSIFIED, 4)));
 }
 
 
-void WritePayload(const Vector<const byte>& payload, const char* file_name) {
+void WritePayload(const List<byte>& payload, const char* file_name) {
   FILE* file = v8::base::OS::FOpen(file_name, "wb");
   if (file == NULL) {
     PrintF("Unable to write to snapshot file \"%s\"\n", file_name);
     exit(1);
   }
   size_t written = fwrite(payload.begin(), 1, payload.length(), file);
   if (written != static_cast<size_t>(payload.length())) {
     i::PrintF("Writing snapshot file failed.. Aborting.\n");
     exit(1);
   }
   fclose(file);
 }
 
 
+void WriteSpaceUsed(Serializer* ser, const char* file_name) {
+  int file_name_length = StrLength(file_name) + 10;
+  Vector<char> name = Vector<char>::New(file_name_length + 1);
+  SNPrintF(name, "%s.size", file_name);
+  FILE* fp = v8::base::OS::FOpen(name.start(), "w");
+  name.Dispose();
+
+  Vector<const uint32_t> chunks = ser->FinalAllocationChunks(NEW_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "new %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(OLD_POINTER_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "pointer %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(OLD_DATA_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "data %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(CODE_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "code %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(MAP_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "map %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(CELL_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "cell %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(PROPERTY_CELL_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "property cell %d\n", chunks[0]);
+  chunks = ser->FinalAllocationChunks(LO_SPACE);
+  CHECK_EQ(1, chunks.length());
+  fprintf(fp, "lo %d\n", chunks[0]);
+  fclose(fp);
+}
+
+
 static bool WriteToFile(Isolate* isolate, const char* snapshot_file) {
   SnapshotByteSink sink;
   StartupSerializer ser(isolate, &sink);
   ser.Serialize();
-  SnapshotData snapshot_data(sink, ser);
-  WritePayload(snapshot_data.RawData(), snapshot_file);
+  ser.FinalizeAllocation();
+
+  WritePayload(sink.data(), snapshot_file);
+  WriteSpaceUsed(&ser, snapshot_file);
+
   return true;
 }
 
 
 static void Serialize(v8::Isolate* isolate) {
   // We have to create one context.  One reason for this is so that the builtins
   // can be loaded from v8natives.js and their addresses can be processed.  This
   // will clear the pending fixups array, which would otherwise contain GC roots
   // that would confuse the serialization/deserialization process.
   v8::Isolate::Scope isolate_scope(isolate);
@@ skipping 27 matching lines @@
     v8::Isolate* isolate = v8::Isolate::New(params);
     Serialize(isolate);
     Serialize(isolate);
   }
 }
 
 
 //----------------------------------------------------------------------------
 // Tests that the heap can be deserialized.
 
+
+static void ReserveSpaceForSnapshot(Deserializer* deserializer,
+                                    const char* file_name) {
+  int file_name_length = StrLength(file_name) + 10;
+  Vector<char> name = Vector<char>::New(file_name_length + 1);
+  SNPrintF(name, "%s.size", file_name);
+  FILE* fp = v8::base::OS::FOpen(name.start(), "r");
+  name.Dispose();
+  int new_size, pointer_size, data_size, code_size, map_size, cell_size,
+      property_cell_size, lo_size;
+#if V8_CC_MSVC
+  // Avoid warning about unsafe fscanf from MSVC.
+  // Please note that this is only fine if %c and %s are not being used.
+#define fscanf fscanf_s
+#endif
+  CHECK_EQ(1, fscanf(fp, "new %d\n", &new_size));
+  CHECK_EQ(1, fscanf(fp, "pointer %d\n", &pointer_size));
+  CHECK_EQ(1, fscanf(fp, "data %d\n", &data_size));
+  CHECK_EQ(1, fscanf(fp, "code %d\n", &code_size));
+  CHECK_EQ(1, fscanf(fp, "map %d\n", &map_size));
+  CHECK_EQ(1, fscanf(fp, "cell %d\n", &cell_size));
+  CHECK_EQ(1, fscanf(fp, "property cell %d\n", &property_cell_size));
+  CHECK_EQ(1, fscanf(fp, "lo %d\n", &lo_size));
+#if V8_CC_MSVC
+#undef fscanf
+#endif
+  fclose(fp);
+  deserializer->AddReservation(NEW_SPACE, new_size);
+  deserializer->AddReservation(OLD_POINTER_SPACE, pointer_size);
+  deserializer->AddReservation(OLD_DATA_SPACE, data_size);
+  deserializer->AddReservation(CODE_SPACE, code_size);
+  deserializer->AddReservation(MAP_SPACE, map_size);
+  deserializer->AddReservation(CELL_SPACE, cell_size);
+  deserializer->AddReservation(PROPERTY_CELL_SPACE, property_cell_size);
+  deserializer->AddReservation(LO_SPACE, lo_size);
+}
+
+
 v8::Isolate* InitializeFromFile(const char* snapshot_file) {
   int len;
   byte* str = ReadBytes(snapshot_file, &len);
   if (!str) return NULL;
   v8::Isolate* v8_isolate = NULL;
   {
-    SnapshotData snapshot_data(str, len);
-    Deserializer deserializer(&snapshot_data);
+    SnapshotByteSource source(str, len);
+    Deserializer deserializer(&source);
+    ReserveSpaceForSnapshot(&deserializer, snapshot_file);
     Isolate* isolate = Isolate::NewForTesting();
     v8_isolate = reinterpret_cast<v8::Isolate*>(isolate);
     v8::Isolate::Scope isolate_scope(v8_isolate);
     isolate->Init(&deserializer);
   }
   DeleteArray(str);
   return v8_isolate;
 }
 
 
@@ skipping 149 matching lines @@
       StartupSerializer startup_serializer(isolate, &startup_sink);
       startup_serializer.SerializeStrongReferences();
 
       SnapshotByteSink partial_sink;
       PartialSerializer partial_serializer(isolate, &startup_serializer,
                                            &partial_sink);
       partial_serializer.Serialize(&raw_foo);
 
       startup_serializer.SerializeWeakReferences();
 
-      SnapshotData startup_snapshot(startup_sink, startup_serializer);
-      SnapshotData partial_snapshot(partial_sink, partial_serializer);
+      partial_serializer.FinalizeAllocation();
+      startup_serializer.FinalizeAllocation();
 
-      WritePayload(partial_snapshot.RawData(), FLAG_testing_serialization_file);
-      WritePayload(startup_snapshot.RawData(), startup_name.start());
+      WritePayload(partial_sink.data(), FLAG_testing_serialization_file);
+      WritePayload(startup_sink.data(), startup_name.start());
+
+      WriteSpaceUsed(&partial_serializer, FLAG_testing_serialization_file);
+      WriteSpaceUsed(&startup_serializer, startup_name.start());
 
       startup_name.Dispose();
     }
     v8_isolate->Exit();
     v8_isolate->Dispose();
   }
 }
 
 
 UNINITIALIZED_DEPENDENT_TEST(PartialDeserialization, PartialSerialization) {
   if (!Snapshot::HaveASnapshotToStartFrom()) {
     int file_name_length = StrLength(FLAG_testing_serialization_file) + 10;
     Vector<char> startup_name = Vector<char>::New(file_name_length + 1);
     SNPrintF(startup_name, "%s.startup", FLAG_testing_serialization_file);
 
     v8::Isolate* v8_isolate = InitializeFromFile(startup_name.start());
     CHECK(v8_isolate);
     startup_name.Dispose();
     {
       v8::Isolate::Scope isolate_scope(v8_isolate);
 
       const char* file_name = FLAG_testing_serialization_file;
 
       int snapshot_size = 0;
       byte* snapshot = ReadBytes(file_name, &snapshot_size);
 
       Isolate* isolate = reinterpret_cast<Isolate*>(v8_isolate);
       Object* root;
       {
-        SnapshotData snapshot_data(snapshot, snapshot_size);
-        Deserializer deserializer(&snapshot_data);
+        SnapshotByteSource source(snapshot, snapshot_size);
+        Deserializer deserializer(&source);
+        ReserveSpaceForSnapshot(&deserializer, file_name);
         deserializer.DeserializePartial(isolate, &root);
         CHECK(root->IsString());
       }
       HandleScope handle_scope(isolate);
       Handle<Object> root_handle(root, isolate);
 
 
       Object* root2;
       {
-        SnapshotData snapshot_data(snapshot, snapshot_size);
-        Deserializer deserializer(&snapshot_data);
+        SnapshotByteSource source(snapshot, snapshot_size);
+        Deserializer deserializer(&source);
+        ReserveSpaceForSnapshot(&deserializer, file_name);
         deserializer.DeserializePartial(isolate, &root2);
         CHECK(root2->IsString());
         CHECK(*root_handle == root2);
       }
     }
     v8_isolate->Dispose();
   }
 }
 
 
@@ skipping 44 matching lines @@
       SnapshotByteSink startup_sink;
       StartupSerializer startup_serializer(isolate, &startup_sink);
       startup_serializer.SerializeStrongReferences();
 
       SnapshotByteSink partial_sink;
       PartialSerializer partial_serializer(isolate, &startup_serializer,
                                            &partial_sink);
       partial_serializer.Serialize(&raw_context);
       startup_serializer.SerializeWeakReferences();
 
-      SnapshotData startup_snapshot(startup_sink, startup_serializer);
-      SnapshotData partial_snapshot(partial_sink, partial_serializer);
+      partial_serializer.FinalizeAllocation();
+      startup_serializer.FinalizeAllocation();
 
-      WritePayload(startup_snapshot.RawData(), FLAG_testing_serialization_file);
-      WritePayload(startup_snapshot.RawData(), startup_name.start());
+      WritePayload(partial_sink.data(), FLAG_testing_serialization_file);
+      WritePayload(startup_sink.data(), startup_name.start());
+
+      WriteSpaceUsed(&partial_serializer, FLAG_testing_serialization_file);
+      WriteSpaceUsed(&startup_serializer, startup_name.start());
 
       startup_name.Dispose();
     }
     v8_isolate->Dispose();
   }
 }
 
 
 UNINITIALIZED_DEPENDENT_TEST(ContextDeserialization, ContextSerialization) {
   if (!Snapshot::HaveASnapshotToStartFrom()) {
     int file_name_length = StrLength(FLAG_testing_serialization_file) + 10;
     Vector<char> startup_name = Vector<char>::New(file_name_length + 1);
     SNPrintF(startup_name, "%s.startup", FLAG_testing_serialization_file);
 
     v8::Isolate* v8_isolate = InitializeFromFile(startup_name.start());
     CHECK(v8_isolate);
     startup_name.Dispose();
     {
       v8::Isolate::Scope isolate_scope(v8_isolate);
 
       const char* file_name = FLAG_testing_serialization_file;
 
       int snapshot_size = 0;
       byte* snapshot = ReadBytes(file_name, &snapshot_size);
 
       Isolate* isolate = reinterpret_cast<Isolate*>(v8_isolate);
       Object* root;
       {
-        SnapshotData snapshot_data(snapshot, snapshot_size);
-        Deserializer deserializer(&snapshot_data);
+        SnapshotByteSource source(snapshot, snapshot_size);
+        Deserializer deserializer(&source);
+        ReserveSpaceForSnapshot(&deserializer, file_name);
         deserializer.DeserializePartial(isolate, &root);
         CHECK(root->IsContext());
       }
       HandleScope handle_scope(isolate);
       Handle<Object> root_handle(root, isolate);
 
 
       Object* root2;
       {
-        SnapshotData snapshot_data(snapshot, snapshot_size);
-        Deserializer deserializer(&snapshot_data);
+        SnapshotByteSource source(snapshot, snapshot_size);
+        Deserializer deserializer(&source);
+        ReserveSpaceForSnapshot(&deserializer, file_name);
         deserializer.DeserializePartial(isolate, &root2);
         CHECK(root2->IsContext());
         CHECK(*root_handle != root2);
       }
     }
     v8_isolate->Dispose();
   }
 }
 
 
@@ skipping 683 matching lines @@
     {
       DisallowCompilation no_compile(reinterpret_cast<Isolate*>(isolate2));
       script = v8::ScriptCompiler::CompileUnbound(
           isolate2, &source, v8::ScriptCompiler::kConsumeCodeCache);
     }
     v8::Local<v8::Value> result = script->BindToCurrentContext()->Run();
     CHECK(result->ToString(isolate2)->Equals(v8_str("XY")));
   }
   isolate2->Dispose();
 }